Synthesis of novel isoxazolidine derivatives and their antifungal and antibacterial properties.

The synthesis of some biologically interesting isoxazolidine derivatives has been accomplished by the cycloaddition reaction of C-(4-biphenyl)-N-(3-methylphenyl) nitrone and C-(4-biphenyl)-N-(3-chlorophenyl) nitrone to monosubstituted alkenes. The compounds were screened for their antibacterial and antifungal activities. Among the tested compounds 3a (ii), 3a (vii), 3a (viii), 3b (iv), 3b (vii), and 3b (viii) showed significant antifungal activity comparable with that of the standard drug Nystatin against Botrydiplodia theobromae.